I'm assuming that hiking involves a significant backpack, whether a daypack or a multi-day internal or external frame backpacker's rig?
I've tried lots of things, but what I keep coming back to is some form of either drop-leg or drop/offset strong side holster.
Whether it's a buscadero style revolver belt and holster, a drop/offset (sometimes called jacket slot) holster, or ninjatactical drop leg rig, the best solution I've found is to leave the belt area free for the waist of the pack to attach properly but the pistol still be accessible. Chest rigs have been too hot for me.